Small update containing some fixes and an engine upgrade.

- [misc] Technical upgrade (new 3rd party libraries) also engine upgrade (small improvements like mute on focus lost).
- [misc] New buttons on main menu page (Discord, Website, etc).

- [fix] Rebels not progressing in the Birth of the Empire game mode. It also fixes your older saves.
- [fix] Crashes during Rename fleet when Delete key is pressed (it seems over the years no one ever tried to press that key, so the bug was unnoticed for so long :D)



Reminders
Recently Steam introduced Steam Developer Page if you follow it you will be notified each time I release a new game/expansion/etc. I strongly recommend to follow it.

In addition, if you have a moment could you please leave a Steam review of the game? It does not need to be long. It makes a big difference for an indie developer like me and increases the chance I will be making games in that style in future.